Actual emissions of nitrogen oxides (NOx) from construction machinery vary widely in practice and depend on use, load and circumstances, among other things. A new measurement method, developed by TNO and Topsector Logistiek, should give construction companies more insight into the emissions of their vehicles.
A standardised way of measuring these emissions was lacking until now. This could lead to uncertainty in nitrogen calculations and delays in permitting.
Figures far from always correct
For instance, since July 2024, practical measurements have been carried out on hundreds of construction machines within the Mobile Tools and Construction Logistics programme (Clean and Emission-free Construction). A recent report by Top Sector Logistics shows that the actual fuel consumption and running hours of machines are often lower than previously assumed. The report, together with a parliamentary letter, was presented to the House of Representatives in September 2024.
TNO and Topsector Logistiek's new measurement method should help construction companies record the emissions of their machines themselves. The method measures NOx and CO₂ emissions, and also maps operational data such as fuel consumption and running hours.
Three components
To get started with the measurement method, a measurement module must be installed in machines. The measurement solution consists of three components: an NOx sensor in the exhaust, an air mass flow sensor in the inlet section and a data logger that collects all the data. An instruction video and manual help mechanics.
The data collected will help companies make their equipment fleets more sustainable and meet stricter environmental requirements. By using real-life data, nitrogen calculations can be performed more accurately. This can avoid delays in obtaining permits and helps optimise the deployment of machinery.
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